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7 Jul 2019

what makes the heavy chai different than the light chain in b cell receptors?

what makes the alpha chain different than the beta chain in t c receptors?

what is the mechanism for antigen recognition by t cells?

where do we see the interferons in the immune system?

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Bunny Greenfelder
Bunny GreenfelderLv2
8 Jul 2019

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Related questions

Fill in the blanks in the following paragraph using words from the word bank below. Not all words will be used, and some may be used more than once.

Like T cells, B cells require multiple signals for activation. Antigen binding to the B cell antigen __________provides one signal, while antigen-specific effector ________ provide the other signals. The requirement for multiple signals to activate either a T cell or a B cell helps to prevent _______ and dangerous activation of _________ , including __________ _________. Most of the proteins involved in cell–cell recognition and antigen recognition in the immune system, including _________ , TCRs, and _______ proteins, as well as various co-receptors, belong to the ancient Ig superfamily. This superfamily is thought to have evolved from a primordial gene encoding a single Ig- like _______ . The mechanisms for diversifying antibodies and T cell receptors by recombining gene segments may have arisen when a _________ inserted into an exon of a gene encoding an Ig family member.

receptors (BCRs) helper T cells killer T cells
inappropriate appropriate monocytes
lymphocytes self-reactive non-self-reactive
antibodies IPR MHC
domain transposon retrovirus

Like T cells, B cells require multiple signals for activation. Antigen binding to the B cell antigen ______ provides one signal, while antigen-specific effector ______ provide the other signals. The requirement for multiple signals to activate either a T cell or a B cell helps to prevent ______ and dangerous activation of monocytes , including ______ ______ . Most of the proteins involved in cell–cell recognition and antigen recognition in the immune system, including ______, TCRs, and ______ proteins, as well as various co-receptors, belong to the ancient Ig superfamily. This superfamily is thought to have evolved from a primordial gene encoding a single Ig- like ______ . The mechanisms for diversifying antibodies and T cell receptors by recombining gene segments may have arisen when a ______ inserted into an exon of a gene encoding an Ig family member.

receptors (BCRs) helper T cells killer T cells
inappropriate appropriate monocytes
lymphocytes self-reactive non-self-reactive
antibodies IPR MHC
domain transposon retrovirus

Question 1

The antigen specificity of a BCR...

A. depends on the isotype of that BCR.
B. is the same as the antigen specificity of the secreted form of antibody produced by that cell.
C. is different for each of the BCRs on a cell.
D. is different for each of the Fab regions of the BCR.

Question 2

All BCRs on the surface of a B cell in a lymph node...

A. will have the same type of light chain (kappa/lambda).
B. will have the same type of light chain with the same exact amino acid sequence.
C. will each have a different type of light chain.
D. will have a lambda light chain on one Fab and a kappa light chain on the other Fab.

Question 3

The isotype of an antibody is...

A. determined by the light chain.
B. another word for an immunoglobulin Fab region.
C. determined by the heavy chain constant region.
D. determined by the Fc portion.
E. None of the above are correct

Question 4

Characteristics of lgG are...

A. a molecular weight of 900,000 and 10 antigen binding sites in the secreted form.
B. 165,000 molecular weight in the monomeric form but it is usually secreted as dimer.
C. the presence of more heavy chain constant regions than most antibodies but the lowest concentration in blood.
D. 150,000 molecular weight and the highest concentrations of all antibodies in blood.
E. None of the above describe IgG.

Question 5

Characteristics of lgM are...

A. 900,000 molecular weight and the secreted form has 10 antigen binding sites.
B. 165,000 molecular weight in the monomeric form but it is usually secreted as dimer.
C .the presence of more heavy chain constant regions than most antibodies but the lowest concentration in blood.
D. 150,000 molecular weight and the highest concentrations of all antibodies in blood.
E. None of the above describe IgM.

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